Add image upload feature
Add primitive authorization to GcsBlobFieldStorageService
Reinstate filename and mime type submission
Merge branch 'production3'

Conflicts:
	core/services/src/main/java/org/activityinfo/service/blob/UploadCredentials.java
	server/src/main/java/org/activityinfo/service/blob/GcsBlobFieldStorageService.java
	ui/app/src/main/java/org/activityinfo/ui/component/form/field/image/ImageUploadRow.java